Suppose 2.02 g of copper(II) nitrate is dissolved in 50 mL of a 0.50 aqueous solution of sodium chromate. Calculate the final molarity of the nitrate anion in the solution. You can assume that the volume of the solution does not change when copper (II) nitrate is dissolved in it. Round your answer to two significant numbers.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

answerlinnaeus;